CN110447201A - The method and device thereof of assigned references signal resource in a wireless communication system - Google Patents
The method and device thereof of assigned references signal resource in a wireless communication system Download PDFInfo
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- CN110447201A CN110447201A CN201880019281.1A CN201880019281A CN110447201A CN 110447201 A CN110447201 A CN 110447201A CN 201880019281 A CN201880019281 A CN 201880019281A CN 110447201 A CN110447201 A CN 110447201A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
Abstract
The present invention relates to a kind of method and apparatus for sending reference signal in a wireless communication system for sending device.Specifically, it the described method comprises the following steps: receiving the setting for the resource pool being made of uplink resource；And based on the resource pool setting and the sending device it is N number of (wherein, N is natural number) antenna, reference signal and data are mapped in specific uplink resource, and it is characterized in that, the reference signal is mapped at least one resource element of the specific location in the specific uplink resource, and the data are mapped in running time-frequency resource, therefore the data are continuous according to the quantity of antenna.
Description
Technical field
This disclosure relates to wireless communication system, and more particularly, to the method and its dress of assigned references signal resource
It sets.
Background technique
It will be briefly described as the exemplary third generation partner program that can apply wireless communication system of the invention
Long term evolution (3GPPLTE) (hereinafter referred to as " LTE ") communication system.
Fig. 1 is the network knot for being shown as the exemplary evolved universal mobile communication system (E-UMTS) of wireless communication system
The figure of structure.E-UMTS is the evolution version of traditional UMTS, and its basic standardization is just in third generation partner program
It is carried out under (3GPP).E-UMTS can be referred to as long term evolution (LTE) system.The details of the technical specification of UMTS and E-UMTS can
To refer to " 3rdGeneration Partnership Project；Technical Specification Group Radio
The version 7 and version 8 of Access Network ".
Referring to Fig.1, E-UMTS includes user equipment (UE), base station (eNodeB；ENB) and access gateway (AG), access
Gateway is located at one end of network (E-UTRAN) and is connected to external network.Base station can be sent simultaneously for broadcast service, more
Broadcast multiple data flows of service and/or unicast services.
There are one or more cells for a base station.One cell is arranged to 1.44,3,5,10,15 and 20MHz
One of bandwidth, to provide downlink or uplink transmission services to multiple user equipmenies.Can be set different community with
Different bandwidth is provided.Moreover, a base station controls the data transmission and reception of multiple user equipmenies.Base station is to relative user equipment
Send down link data downlink (DL) scheduling information, with to relative user equipment notification data by be sent to when
Domain and frequency domain and with coding, size of data and the related information of hybrid automatic repeat-request (HARQ).In addition, base station is to correspondence
User equipment sends uplink (UL) scheduling information of uplink data, to notify corresponding user to set to relative user equipment
The standby time domain that can be used and frequency domain and information related with coding, size of data and HARQ.It can use between the base stations
For sending customer service or controlling the interface of business.Core net (CN) may include AG and the user's registration for user equipment
Network node etc..AG is based on the mobility of tracing area (TA) management user equipment, and one of TA includes multiple cells.
Although the wireless communication technique based on WCDMA exploitation has been evolved to LTE, the request of user and supplier and
It is expected that continuing growing.Further, since another wireless access technology is continuously developed, following competitiveness will require to wirelessly communicate
The new evolution of technology.In this respect, it is desirable that the reduction of every bit cost, the increase of available service, the use of adaptive frequency band, letter
Single structure and open interface, the appropriate power consumption of user equipment etc..
Summary of the invention
Technical problem
Based on discussed above, the present disclosure proposes a kind of method of assigned references signal resource in a wireless communication system and
Its device.
It can not limited from the technical assignment that the present invention obtains by above-mentioned technical assignment.Also, according to being described below, originally
The those of ordinary skill of technical field that the present invention belongs to is clearly understood that other unmentioned technical assignments.
Technical solution
In the one side of the disclosure, provided herein is one kind to send reference signal by sending device in a wireless communication system
Method.This method may comprise steps of: receive the configuration for the resource pool being made of uplink resource, and being based on should
N number of antenna (wherein N is natural number) of resource pool configuration and sending device, is mapped to specified upstream chain for reference signal and data
Road resource.Reference signal can be mapped to the resource of one or more specific locations in specific uplink resource
Element, and the specific uplink resource other than one or more specific positions can be mapped the data into, so that
The orthogonal in a time domain or in a frequency domain and quantity with antenna of data is as many continuous.
Reference signal and data can be mapped at least one resource collection, and each resource collection is by N+1 resource element
Element composition.The distance between the reference signal for being mapped at least one resource collection can correspond to N+1 resource element.
N can be 4, and reference signal can be configured as and be mapped at least one described resource collection and described
Resource element not to be covered at least one described resource collection in specific uplink resource.
At least one described resource collection may include first resource set and Secondary resource set, and described first provides
Source set and the Secondary resource set can be configured as using different antennae port.
Only when the movement speed of sending device is equal to or less than predetermined value, data can be just mapped, so that data are each other
It is orthogonal.
The data can be configured as by the time domain apply Space-Time Block Coding (space-time block code,
STBC) and orthogonal on the uplink resource other than one or more of specific positions.
By applying space-time/frequency block code (space-frequency block code, SFBC) in a frequency domain, data can be with
It is configured as orthogonal on the uplink resource other than one or more specific positions.
Can reference signal be mapped in a manner of N comb (N-comb) in a time domain or in a frequency domain.
Uplink resource can correspond to uplink subframe.
In another aspect of the invention, provided herein is a kind of for sending the hair of reference signal in a wireless communication system
Send device.Sending device may include radio frequency unit and processor.The processor can be configured as reception by uplink
The configuration of the resource pool of resource composition, and (wherein N is certainly to N number of antenna based on resource pool configuration and the sending device
So count) reference signal and data are mapped to specific uplink resource.Reference signal can be mapped to positioned at specified upstream
The resource element of one or more specific locations in link circuit resource, and can map the data into addition to one or more
Specific uplink resource other than multiple specific positions, so that data are orthogonal and with antenna in a time domain or in a frequency domain
Quantity is as many continuous.
Beneficial effect
According to the disclosure, it can be effectively carried out reference signal resource distribution in a wireless communication system.
It can not limited from the effect that the present invention obtains by said effect.And according to being described below, belonging to the present invention
The those of ordinary skill of technical field is clearly understood that other unmentioned effects.
Detailed description of the invention
Attached drawing is included to provide a further understanding of the present invention and be incorporated in the present specification and constituted
A part of this specification, accompanying drawing shows embodiment of the present invention, and for explaining the present invention together with specification
Principle.
Fig. 1 schematically shows the exemplary E-UMTS network structure as wireless communication system.
Fig. 2 shows the radio interface protocol between UE and E-UTRAN based on 3GPP wireless access network standard
Control plane and user plane structure.
The general signal transmission side that Fig. 3 shows the physical channel used in a 3 gpp system and uses the physical channel
Method.
Fig. 4 shows radio frame structure used in LTE.
Fig. 5 shows the resource grid for downlink time slots.
Fig. 6 shows the structure of downlink radio frame used in LTE system.
Fig. 7 shows the structure of uplink radio frame used in LTE system.
Fig. 8 be for describe D2D (UE to UE) communication with reference to figure.
Fig. 9 be for describe V2V scene with reference to figure.
Figure 10 and Figure 11 be for describe the resource pool in D2D scene with reference to figure.
Figure 12 to Figure 17 is shown according to the distribution of the reference signal of embodiment of the present disclosure with reference to figure.
Figure 18 and Figure 19 is for explaining according to the mapping of the pectination of embodiment of the present disclosure with reference to figure.
Figure 20 shows the base station that can be applied to an embodiment of the invention and user equipment.
Specific embodiment
Following technology can be used for various wireless access technologys, such as CDMA (CDMA), FDMA (frequency division multiple access),
TDMA (time division multiple acess), OFDMA (orthogonal frequency division multiple access) and SC-FDMA (single-carrier frequency division multiple access).CDMA can be by such as
The radio technology of UTRA (universal terrestrial radio access) or CDMA2000 is realized.TDMA can be mobile by such as whole world
The radio skill of communication system (GSM)/general packet radio service (GPRS)/enhancing GSM evolution data rate (EDGE)
Art is realized.OFDMA can pass through such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), 802.20 and of IEEE
The radio technology of evolution UTRA (E-UTRA) is realized.UTRA is a part of Universal Mobile Telecommunications System (UMTS).Third
It is a part of evolution UMTS (E-UMTS) for partner program long term evolution (3GPP LTE), evolution UMTS uses E-UTRA
And SC-FDMA is used using OFDMA in the uplink in the downlink.Advanced LTE (LTE-A) is 3GPP LTE
Evolution version.
In order to illustrate it is clear, should although following embodiment will be described based on 3GPP LTE/LTE-A
Understand, technical spirit of the invention is not limited to 3GPP LTE/LTE-A.Further it is provided that making in embodiments of the present invention below
Specific term, and can be in the range of not departing from technical spirit of the invention to specific art to help to understand the present invention
Language carry out various modifications.
Fig. 2 is that the radio shown between user equipment and E-UTRAN based on 3GPP radio access network standard connects
The figure of the structure of the control plane and user plane of mouth agreement.Control plane means the channel of transmitting control message, wherein control
Message processed is used to manage calling by user equipment and network.User plane means to transmit the data (example generated in application layer
Such as, voice data or internet packet data) channel.
Physical layer as first layer uses physical channel to provide information transmission service to upper layer.Physical layer is believed via transmission
Road is connected to medium access control (MAC) layer, wherein media access control layer is located on physical layer.Exist via transmission channel
Data are transmitted between media access control layer and physical layer.Physical layer and receiving side via physical channel in sending side
Data are transmitted between another physical layer.Physical channel uses time and frequency as radio resource.In more detail, in downlink
According to orthogonal frequency division multiple access (OFDMA) scheme modulation physical channel in link, and in the uplink according to single carrier frequency division
Multiple access (SC-FDMA) scheme modulation physical channel.
Medium access control (MAC) layer of the second layer is controlled via logic channel to the radio link on MAC layer
(RLC) layer provides service.The rlc layer of the second layer supports reliable data transmission.Rlc layer may be implemented as the function in MAC layer
It can block.In order to use the IP grouping of such as IPv4 or IPv6 effectively to send data in the radio interface with narrow bandwidth,
Packet Data Convergence Protocol (PDCP) layer of the second layer executes header-compressed, to reduce the size of unnecessary control information.
Only definition is located at radio resource control (RRC) layer in the lowermost portion of third layer in the control plane.Rrc layer
With the configuration of radio bearer (" RB "), reconfigure and discharge it is associated, to be responsible for control logic channel, transmission channel and object
Manage channel.In this case, the data transmission being used between user equipment and network that RB means to be provided by the second layer
Service.For this purpose, the rrc layer of user equipment and the rrc layer of network exchange RRC information each other.If the rrc layer and net of user equipment
The rrc layer of network carries out RRC connection, then user equipment is in RRC connection mode.If it is not, then user equipment is in the RRC free time
Mode.Non-Access Stratum (NAS) on rrc layer executes the function of such as session management and mobile management.
A cell for constituting base station eNB is arranged to one of the bandwidth of 1.4,3.5,5,10,15 and 20MHz, and to
Multiple user equipmenies provide downlink or uplink transmission services.At this point it is possible to which different community is arranged to provide different band
It is wide.
The downlink transmission channel of data as carrying from from network to user equipment, provides the wide of bearing system information
The downlink for broadcasting channel (BCH), the paging channel (PCH) of bearing call message and carrying customer service or control message is shared
Channel (SCH).The business or control message of Downlink multicast or broadcast service can be via downlink SCH or additional downlinks
Link Multicast Channel (MCH) is sent.Meanwhile the uplink of the data as carrying from user equipment to network transmits letter
Road provides the random access channel (RACH) of carrying initial control message and the uplink of carrying customer service or control message
Share channel (UL-SCH) in road.As the logic channel being located on transmission channel and with transmission channel mapping, broadcast is provided
Control channel (BCCH), Paging Control Channel (PCCH), common control channel (CCCH), multicast control channel (MCCH) and multicast
Traffic Channel (MTCH).
Fig. 3 shows the physical channel used in 3GPP LTE system and for using the physical channel to send signal
The figure of conventional method.
When user equipment is when step S301 newly enters cell or powers on, user equipment execute such as with base station synchronization
Search of initial zone.For this purpose, user equipment is by receiving primary synchronization channel (P-SCH) and auxiliary synchronization channel (S- from base station
SCH) come with base station synchronization, and obtain the information of cell ID etc..Later, user equipment can be by receiving object from base station
Broadcast channel (PBCH) is managed to obtain the broadcast message in cell.Meanwhile user equipment can be by walking in search of initial zone
Downlink reference signal (DL RS) is received in rapid to identify downlink channel status.
The user equipment for having completed search of initial zone can be in step s 302 by according to physical down link control
Channel (PDCCH) processed and the information carried in PDCCH receive physical down link sharing channel (PDSCH) to obtain in more detail
System information.
Later, user equipment can execute random access procedure (RACH) (such as step S303 to S306), with completion pair
The access of base station.For this purpose, user equipment can be sent lead code (S303) by Physical Random Access Channel (PRACH), and
And response message (S304) to lead code can be received by PDCCH and PDSCH corresponding with PDCCH.Based on competing
In the case where the RACH striven, user equipment can execute contention resolved process, the transmission of such as additional Physical Random Access Channel
(S305) and physical downlink control channel and physical down link corresponding with physical downlink control channel are total
Enjoy the reception (S306) of channel.
The user equipment for having been carried out above-mentioned steps can receive physical downlink control channel (PDCCH)/physics
Downlink sharied signal channel (PDSCH) (S307), and send physical uplink shared channel (PUSCH) and physical uplink chain
Road control channel (PUCCH) (S308), as the general process for sending uplink/downlink signal.It is sent out from user equipment
The control information for being sent to base station will be referred to as uplink control information (UCI).UCI includes that (mixing is automatic by HARQ ACK/NACK
Retransmission request confirms/negate ACK), SR (scheduling request), CSI (channel state information) etc..In the present specification, HARQ ACK/
NACK will be referred to as HARQ-ACK or ACK/NACK (A/N).HARQ-ACK includes affirmative ACK (referred to as ACK), negative ACK
(NACK), at least one of DTX and NACK/DTX.CSI includes CQI (channel quality indicator), (pre-coding matrix refers to PMI
Show symbol), RI (order instruction) etc..Although usually sending UCI by PUCCH, if should send simultaneously control information and
Business datum then can send UCI by PUSCH.In addition, user equipment can pass through according to request/order of network
PUSCH aperiodically sends UCI.
Fig. 4 is the figure for showing the structure of radio frame used in LTE system.
Referring to Fig. 4, in cellular OFDM packet radio communication system, uplink/downlink is executed as unit of subframe
Link data grouping transmission, one of subframe is by including that the given interval of multiple OFDM symbols defines.3GPP LTE mark
Standard is supported to can be applied to the Class1 radio frame structure of frequency division duplex (FDD) and can be applied to the type 2 of time division duplex (TDD)
Radio frame structure.
(a) of Fig. 4 is the figure for showing the structure of Class1 radio frame.Downlink radio frame includes 10 subframes, often
A subframe includes two time slots in time domain.Time needed for sending a subframe will be referred to as transmission time interval (TTI).Example
Such as, a subframe can have the length of 1ms, and a time slot can have the length of 0.5ms.One time slot is in the time domain
It including multiple OFDM symbols and in a frequency domain include multiple resource blocks (RB).Since 3GPP LTE system makes in the downlink
With OFDM, so OFDM symbol indicates a mark space.OFDM symbol can be referred to as SC-FDMA symbol or mark space.
Resource block (RB) as resource allocation unit can include multiple continuous subcarriers in one time slot.
Quantity including OFDM symbol in one time slot can change according to the configuration of cyclic prefix (CP).CP's
Example includes extension CP and routine CP.For example, if OFDM symbol is configured by conventional CP, including OFDM in one time slot
The quantity of symbol can be 7.If OFDM symbol is configured by extension CP, since the length of an OFDM symbol increases, so
The quantity for the OFDM symbol for including in one time slot is less than the quantity of OFDM symbol in the case where conventional CP.For example, In
In the case where extending CP, the quantity including OFDM symbol in one time slot can be 6.If channel status is unstable, such as
The case where user equipment high-speed mobile, then extending CP can be used for reducing intersymbol interference.
If using routine CP, since a time slot includes seven OFDM symbols, so a subframe includes 14
OFDM symbol.At this point it is possible to which first three maximum OFDM symbol of each subframe is distributed to physical downlink control channel
(PDCCH), and other OFDM symbols can be distributed to physical down link sharing channel (PDSCH).
(b) of Fig. 4 is the figure for showing the structure of 2 radio frame of type.2 radio frame of type includes two fields, each
Field includes four general subframes and a special subframe, and general subframe includes two time slots, and special subframe includes downlink
Pilot time slot (DwPTS), protective time slot (GP) and uplink pilot time slot (UpPTS).
In special subframe, DwPTS is for search of initial zone, synchronization or the channel estimation at user equipment.UpPTS is used
It is synchronous with the transmission of the uplink of user equipment in the channel estimation of base station.In other words, DwPTS is passed for downlink
It is defeated, and UpPTS is transmitted for uplink.Particularly, UpPTS is used for PRACH lead code or SRS transmission.In addition, protective time slot
Occur in the uplink for removing the multidiameter due to the down link signal between uplink and downlink
Interference.
As shown in Table 1 below, the configuration of special subframe is defined in current 3GPP normative document.Table 1 is shown
TsDwPTS and UpPTS in the case where=1/ (15000 × 2048), and another region is configured for protective time slot.
[table 1]
Meanwhile 2 radio frame of type (that is, uplink/downlink configuration (UL/DL configuration)) in TDD system
Structure is as shown in table 2 below.
[table 2]
In upper table 2, D indicates downlink subframe, and U indicates uplink subframe, and S indicates special subframe.In addition, table 2
Also show the downlink-uplink switching cycle in the uplink/downlink sub-frame configuration of each system.
The structure of above-mentioned radio frame is merely exemplary, and can be to the number for including subframe in radio frame
It measures, include that the quantity of time slot in subframe or the quantity including symbol in a slot carry out various modifications.
Fig. 5 shows the resource grid for downlink time slots.
Referring to Fig. 5, DL time slot includes in the time domainA OFDM symbol and include in a frequency domainA resource block.
Since each resource block includesA subcarrier, so DL time slot includes in a frequency domainA subcarrier.Although Fig. 5
Show that DL time slot includes 7 OFDM symbols and resource block includes the example of 12 subcarriers, but the invention is not restricted to this.
E.g., including the quantity of the OFDM symbol in DL time slot can change according to the length of cyclic prefix (CP).
Each element on resource grid is referred to as resource element (RE), and single resource element is by an OFDM symbol
Index and a sub-carrier indices instruction.Single RB is configured withA resource element.The resource block for including in DL time slot
QuantityDepending on the DL transmission bandwidth configured in cell.
Fig. 6 shows the structure of downlink radio frame.
Referring to Fig. 6, up to 3 (or 4) a OFDM symbols positioned at the head of the first time slot of subframe, which correspond to, to be assigned
The control zone of control channel.Also, remaining OFDM symbol, which corresponds to, is assigned PDSCH's (physical down link sharing channel)
Data field.For example, DL control channel used in LTE system may include PCFICH (physical control format indicator channel),
PDCCH (physical downlink control channel), PHICH (Physical Hybrid ARQ Indicator channel) etc..PCFICH in subframe first
It is sent in OFDM symbol, and carries information related with the quantity of OFDM symbol in the subframe for control channel transmission.
PHICH is transmitted in response to UL and is carried HARQ ACK/NACK (hybrid automatic repeat-request ack/nack) signal.
The control information sent on PDCCH is referred to as DCI (down link control information).DCI includes setting for user
Standby or group of user equipments resource allocation information and other control information.For example, DCI may include UL/DL scheduling information, UL biography
Defeated (Tx) power control command etc..
PDCCH carries the transformat and resource allocation information, UL-SCH (uplink of DL-SCH (downlink sharied signal channel)
Link shared channels) transformat and resource allocation information, the paging information on PCH (paging channel), on DL-SCH be
Unite information, the higher level control message of the random access response such as sent on PDSCH resource allocation information, be directed to user
The activation of the Tx power control command collection, VoIP (ip voice) of each user equipment setting in equipment group indicates information etc..It can
To send multiple PDCCH in control zone.User equipment can monitor multiple PDCCH.In one or more continuous CCE (controls
Channel element) polymerization on send PDCCH.In this case, CCE is for providing to PDCCH based on radio channel shape
The logical allocation unit of the encoding rate of state.CCE corresponds to multiple REG (resource element groups).PDCCH format and PDCCH bit
Quantity is determined according to the quantity of CCE.Base station determines PDCCH format according to the DCI of user equipment to be sent to, and will
CRC (cyclic redundancy check) is attached to control information.According to the owner or purpose is used, with identifier (for example, RNTI is (wireless
Network Temporary Identifier)) shelter CRC.For example, providing PDCCH if it is special user equipment, can be set with corresponding user
Standby identifier (for example, C-RNTI (cell-RNTI)) shelters CRC.PDCCH is provided if it is paging message, it can benefit
CRC is sheltered with paging identifier (for example, P-RNTI (paging-RNTI)).If it is system information (specifically, SIC (system
Block of information)) PDCCH is provided, then it can use SI-RNTI (system information-RNTI) to shelter CRC.In addition, if it is connecing at random
Enter response and PDCCH is provided, then can use RA-RNTI (random access-RNTI) to shelter CRC.
Fig. 7 shows the structure of uplink subframe used in LTE system.
Referring to Fig. 7, uplink subframe includes multiple time slots (for example, 2 time slots).Depending on the length of CP, Mei Geshi
Gap may include the SC-FDMA symbol of different number.UL subframe can be divided into data field and control zone in a frequency domain.Data
Area includes PUSCH, and the data-signal for sending audio etc..Control zone includes PUCCH, and for sending UCI
(uplink control information).PUCCH includes RB pair at the both ends of the data field on frequency axis, and in boundary of time slot
Upper jump.
PUCCH can be used for sending following control information.
- SR (scheduling request): this is the information for requesting UL-SCH resource, and uses OOK (on-off keying) scheme
To send.
- HARQ ACK/NACK: this is in response in the response signal of the DL data grouping on PDSCH, and indicates DL data
Whether grouping has been successfully received.1 bit ACK/NACK is sent as the response to single downlink code word, and sends 2
Bit ACK/NACK is as the response to two downlink code words.
- CSI (channel state information): this is the feedback information on downlink channel.CSI includes channel quality indicator
(CQI).MIMO (multiple-input and multiple-output) related feedback information includes order designator (RI), precoding matrix indicators (PMI), pre-
Type of coding indicator (PTI) etc..20 bits are used in each subframe.
The amount (UCI) for the control information that user equipment can be sent in subframe depends on can be used for sending control information
The quantity of SC-FDMA symbol.The SC-FDMA symbol that can be used for transmitting control information corresponds in addition to for transmitting ginseng in subframe
Examine remaining SC-FDMA symbol other than the SC-FDMA symbol of signal.In the feelings for the subframe for being configured with detection reference signal (SRS)
Under condition, the last SC-FDMA symbol of subframe is excluded from the SC-FDMA symbol that can be used for transmitting control information.Reference signal is used
In the relevant detection of PUCCH.
Hereinafter, by description D2D (UE to UE) communication.
The scheme and network/coordination that D2D communication plan can be supported using classification as network/coordination station (for example, base station)
It stands the scheme that do not support.
Network/coordination station, which is shown, referring to Fig. 8, (a) of Fig. 8 intervenes control signal (for example, grant message), HARQ, letter
The user equipment for sending and receiving and executing D2D of channel state information etc. only sends and receives the scheme of data.On the other hand,
(b) of Fig. 8 shows a kind of scheme, and in this scenario, network only provides minimal information (for example, available in respective cell
D2D link information), but the user equipment for executing D2D communication establishes link to send and receive data.
Fig. 9 is the figure for showing V2X (vehicle to all) communication environment.
In case of car accident, many people can die, and cause serious property loss.Therefore, to can ensure pedestrian
Safety and the demand of technology of safety of the people in vehicle increasingly increase.In addition, based on the hardware that is exclusively used in vehicle and soft
The technology of part has been transplanted on vehicle.
Recently, V2X (vehicle to all) communication technology based on LTE come from 3GPP evolution reflects information technology
(IT) trend being transplanted on vehicle.Linkage function is applied to certain form of vehicle, and drilling with communication function
Into, be continuing effort to research and development vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communicate, vehicle to pedestrian
(V2P) communication and vehicle are communicated to network (V2N).
It is communicated according to V2X, vehicle broadcasts the information about its own position, speed, direction etc. always.Receiving broadcast
After information, neighbouring vehicle utilizes the information for accident prevention by identifying the movement of other Adjacent vehicles.
That is, with the similar fashion of the personal user equipment for carrying smart phone, smartwatch etc., it can be in each vehicle
Certain types of user equipment (UE) is installed in.Here, the UE installed in the car refers to that practical receive from communication network is led to
The equipment of telecommunications services.For example, installing the eNB that UE in the car can be accessed in E-UTRAN and being provided communication service.
However, there are the various projects being contemplated that for for realizing the processing of V2X communication in the car.This be because
Traffic safety facilities for the installation base station V2X etc. need very high cost.That is, for the institute that can be moved in vehicle
Have and support V2X communication on road, needs to install base station hundreds of or thousands of V2X or more.Further, since each network node makes
With being essentially available for accessing internet or centralized control server with the cable network of server stabilized communication, therefore wired network
The cost of installation and maintenance of network is also very high.
Hereinafter, being illustrated to the resource allocation for executing V2X communication in the present invention.Although clear for description
Chu describes the present invention by limiting the invention to V2X scene, but present invention can apply to such as device-to-device (D2D)
Other communication systems of communication.
Figure 10 be for describe UE to UE direct communication with reference to figure.When UE is executed and another UE using direct wireless channel
Communication when, as shown in Figure 10, the invention proposes a kind of determination for communication resource method.This method can be referred to as
UE to UE direct signal transmission/reception or device-to-device (D2D) communication, and it is also known as the downlink with existing cellular communication
The sidelinks that link (DL) and uplink (UL) distinguish.In addition, the communication between multiple equipment can be referred to as and vehicle
Associated vehicle is communicated to vehicle (V2V).Therefore, although UE means the UE (or automobile) of user, if such as eNB
The network equipment signal is sent/received to UE communication method according to UE, then the network equipment be considered can using this
A kind of UE of invention.In addition, eNB can receive the D2D signal sent by UE.In addition, the signal of the UE designed for D2D transmission
Transmission/method of reseptance is suitable for the operation that UE sends data to eNB.
In the following description, UE1 can be to select and specific money from a series of resource pool of set for indicating resources
The corresponding resource unit in source and the mode of D2D signal is sent using corresponding resource unit to operate.As Rx UE's
UE2 can receive the configuration of the transmission D2D signal of the resource pool of UE1, and the signal of UE1 is detected in corresponding resource pool.
Here, if UE1 is in the join domain of base station, resource pool can be notified from base station to UE1.If UE1 is in the company of base station
It connects except range, then can notify resource pool from another UE to UE1, or resource pool can be determined as to previously determined money
Source.In general, configuring resource pool with multiple resource units.Each UE can choose single or multiple resource units, and by institute
The resource unit of selection is transmitted for the D2D signal of its own.
Figure 11 shows an example of the configuration of resource unit.Figure 11 is shown so that full rate resource is divided into NF
Unit and full time resource is divided into the mode of NT unit come the case where defining total NF × NT resource unit.In Figure 11
In, every NT subframe repeats corresponding resource pond.Typically, as shown in figure 11, single resource unit can be to be repeated cyclically
Mode occurs.Alternatively, mapping a logical resource unit to obtain the physical resource of the diversity in time or frequency dimension
The index of unit can change in a predetermined pattern according to the time.In such resource unit structure, resource pool can refer to available
In the sets of resource units of the UE transmission by wanting to send D2D signal.
In addition, resource pool can be subdivided into various types.It is possible, firstly, to be believed according to the D2D sent in each resource pool
Number content divide resource pool.For example, the content of D2D signal can be classified as follows.And it is possible to single for the configuration of each content
Only resources bank.
Dispatching distribution (SA) (or sidelinks control channel): including such as being sent then by each transmission (Tx) UE
Modulation and Coding Scheme (MCS), MIMO transmission method needed for the position of the resource of D2D data channel, demodulation data channel etc.
The signal of information.Such SA signal can be sent on same resource unit and with D2D data-reusing.In this feelings
Under condition, SA resource pool can assign the resource pool being equipped with by with the resource for sending SA and D2D data-reusing on it.
D2D data channel (sidelinks share channel): configured with for by Tx UE using by SA specify resource come
Send the resource pool of the resource of user data.If by being possible with transmission of the D2D data-reusing on same resource unit
, then the D2D data channel of the type other than SA information is only sent in the resource pool for D2D data channel.It can be with
It says, the resource element that SA information is sent on the single resource unit in SA resource pool is still used in D2D data channel
D2D data are sent in resource pool.
It was found that message (or sidelinks discovery channel): for the resource pool of message, Tx UE makes phase by the resource pool
Adjacent UE can have found Tx UE itself by the information of the ID of transmission Tx UE etc..
Synchronization signal/channel (or sidelinks synchronization signal, sidelinks broadcast channel): for signal/channel money
Source pond, to realize that Tx UE sends synchronization signal and with synchronous related information so that Rx (reception) UE can be by time/frequency
It is synchronous with the time/frequency of Tx UE synchronize the purpose that matches.
Although the resource pool individually in subframe can be used in SA and data, if UE can be in single frame simultaneously
SA and data are sent, then can configure two kinds of resource pool in same subframe.
In addition, in the identical situation of above-mentioned D2D signal content, according to the transmission of D2D signal/reception attribute, difference money
Source pond is available.For example, although D2D data channel or discovery message it is identical, according to transmission timing determine method (whether
D2D signal is sent in the receiving time of synchronous reference signal, if constant by the repetition timing application in synchronous reference signal
Timing advance sends D2D signal etc.), resource allocation methods are (for example, whether the transfer resource of individual signal is assigned to by eNB
Whether individual Tx UE, or individual Tx UE by itself select individual signal transfer resource from resource pool), signal format (example
Such as, the number of the every D2D signal quantity of occupied symbol, subframe for sending single D2D signal in a single sub-frame
Amount), the signal strength from eNB and the transmission power level of D2D UE etc., it can be divided into different resource pond again.
It is clear for description, eNB is directly indicated to the method for the transfer resource of D2D Tx UE defines in D2D communication
For mode 1.Also, when being pre-configured with transfer resource region or eNB specifies transfer resource region, UE directly selects transmission money
The method in source is defined as mode 2.In the case where D2D discovery, eNB directly indicates to be defined as type 2 the case where resource.And
And UE directly selects to be defined as the case where transfer resource from the resource area that the resource area or eNB previously configured indicates
Class1.
In addition, SA can be referred to as physical side link control channel as described above, D2D can be referred to as sidelinks
(PSCCH), D2D synchronization signal can be referred to as sidelinks synchronization signal (SSS), be carried on before D2D is communicated and mono- starting of SSS
The control channel for the most basic information sent can be referred to as physical side link broadcast channel (PSBCH) or physics D2D synchronizing channel
(PD2DSCH)。
It is located at neighbouring signal in addition, noticing it for particular UE (here, the ID of particular UE can be included in the signal
In) or such channel can be referred to as physical side link discovery channel (PSDCH).
According to the Rel.12 about LTE system, only D2D communication UE sends PSBCH and SSS together in D2D, thus makes
The measurement of SSS is executed with the DMRS of PSBCH.The DMRS of UE measurement PSBCH outside coverage area, then by measuring the signal
RSRP etc. determine whether to become synchronisation source.
Desired control channel and data channel coexist in V2X communication.Assuming that when control channel and data channel close each other
When connection, multiple vehicle sending cycle message.Assuming that vehicle is UE, then UE can be by being decoded control channel or in number
It is believed that executing energy sensing on road to know the resource location of currently transmitted message.In addition, UE is even it is known that will be by it
It sends the resource location that UE is used.
As more and more communication equipments need higher communication capacity to send and receive signal, with existing radio
Access technology (RAT) is compared, and the demand to mobile broadband communication has greatly improved.In addition, can be by connecting multiple equipment
Or things provides the large-scale machines type communications (MTC) of various services at any time and Anywhere and has been considered under being
Major issue in generation communication system.In addition, having discussed the service/UE that can be supported to reliability and delay-sensitive
Communication System Design.Consideration enhancing mobile broadband communication, extensive MTC, the communication of super reliable and low latency are discussed
(URLLC) introducing of RAT of new generation such as.In the disclosure, for simplicity, corresponding technology is known as new RAT (NR).
Based on above-mentioned technical characteristic, the present disclosure describes a kind of uplink communication of downlink resources in use or
The method of multiple-input and multiple-output (MIMO) Space-Time Block Coding (STBC) technology is used in V2X.
Firstly, will describe to obtain by the way that STBC is applied to mutiple antennas when downlink resources are communicated in use
The method of diversity.It can be using V2X or uplink communication as the representative example of the communication using uplink resource.Separately
Outside, two types can be broadly divided into using the method that mutiple antennas obtains diversity.The first is the closed loop using channel feedback
MIMO technology is for second the open loop MIMO techniques of not channel feedback.
In general, closed-loop MIMO techniques have than open loop MIMO techniques better performance.However, for this purpose, it shall be guaranteed that
Accurate channel feedback information.In V2X communication, if many vehicles are attempted to obtain diversity using mutiple antennas, vehicle can
A large amount of feedbacks can be needed to obtain the feedback information in each vehicle link.In this case, the open loop MIMO not fed back
Technology can be efficient, rather than using many resources for feeding back.
In V2X communication, the channel between vehicle may quickly change due to hot-short.Due to quickly changing when channel
Channel feedback may become inaccuracy when change, therefore for performance, may be more preferable than using closed-loop MIMO using open loop MIMO.
Therefore, the disclosure pays close attention to the scheme based on STBC, is the representative example of open loop MIMO scheme.STBC is as above
The abbreviation of the Space-Time Block Coding, and be create and use using non-orthogonal spatial and time resource it is orthogonal or quasi- orthogonal
The technology of time-space resource.According to the technology, it is assumed that the time resource with almost the same channel is equal to each other, and then makes
It is orthogonal or quasi-orthogonal for being equal to each other with channel by Space resources distribution.
STBC race is broadly divided into two classes: the first kind is the STBC that orthogonal transmission is carried out using time-domain resource, and the second class is to make
The space-time/frequency block code (SFBC) of orthogonal transmission is carried out with frequency domain resource.
For example, it is assumed that my Mu Di (Alamouti) scheme then can be used there are two transmission antennas.According to my Mu
Base of a fruit scheme regularly sends data vector [x first1 x2]T, and data vector is regularly sent secondIt is false
If using identical channel there are a receiving antenna and in the first timing and the second timing, then receiving signal can be expressed as
As in equationi.
[equation 1]
y1=h1x1+h2x2+n1
In equation 1, y1Indicate the signal in the first timing receipt, y2Indicate the signal in the second timing receipt.In addition,
n1Indicate the thermal noise at the first timing, n2Indicate the thermal noise at the second timing.In addition, h1It indicates from antenna 1 to receiving antenna
Channel, h2Indicate the channel from antenna 2 to receiving antenna.In this case, by being conjugated y2, equation 1 can be revised as
As shown in equation 2.
[equation 2]
From equation 2 as can be seen that regularly sending data vector [x first with working as1 x2]TAnd it is also regularly sent second
Data vector [x1 x2]TWhen compare, space resources is changed to orthogonal, and diversity gain doubles.
In Rel-14 LTE V2X, first OFDM symbol in a subframe is used for automatic growth control (AGC), and
And the last one OFDM symbol therein is preserved for Rx/Tx switching time.That is, data and reference signal be mapped in addition to
OFDM symbol other than two OFDM symbols.Figure 12 shows the frame structure in Rel-14 LTE V2X.
It, may there is no the problems in data mappings when frame structure shown in SFBC is applied to Figure 12.For example, it is assumed that
Frequency resource #0 and #1 are used for the data in OFDM symbol #1 based on my Mu Di scheme, then orthogonal transmission may be implemented, because
It can have similar channel for the two resources.
However, there is a problem of related with peak-to-average power ratio (PAPR) in the case where SFBC.I.e., it is assumed that single carrier frequency
Multiple access (SC-FDMA) is divided to be applied to V2X communication, extending reduced PAPR by Discrete Fourier Transform (DFT) can pass through
Orthogonal SFBC mapping increases again.
Meanwhile in the case where STBC, PAPR can be reduced according to how to execute data mapping.However, STBC's
In the case of, it may be difficult to execute data mapping in frame structure shown in Figure 12.For example, assuming that same channel based on
In the case where the scheme of STBC, it is expected that STBC is applied to OFDM symbol #1 and #2, but since reference signal is mapped to
OFDM symbol #2, so data cannot be mapped to OFDM symbol #2.Therefore, data should be mapped to OFDM symbol #3, in advance
There are most like channels for expectation in symbol #3 for meter.When data are mapped to OFDM symbol #1 and #3 and answer between them
When with STBC, compared with when data are mapped to OFDM symbol #1 and #2 and apply STBC between them, due to channel phase
Like the reduction of property, performance be may be decreased.
Based on features described above, embodiment of the present disclosure is described below.
<first embodiment>
It, can be by N+1 continuous OFDM when using N number of antenna applications STBC according to the first embodiment of the disclosure
Symbol is set as a set.In each set, it is N number of STBC to be applied to that data are mapped to N number of continuous OFDM symbol
Continuous OFDM symbol, and reference signal is mapped to a remaining OFDM symbol for channel estimation.
For example, it is assumed that there are two antenna, if first and the last one OFDM symbol are such as in 3GPP Rel-14 LTE
AGC and Rx/Tx switching time is respectively used in V2X, then remaining 12 OFDM symbols can be grouped into four set: { #
1, #2, #3 }, { #4, #5, #6 }, { #7, #8, #9 } and { #10, #11, #12 }.
In this case, if using first embodiment, it is contemplated that following two situation.In the first situation
Under, DMRS is mapped to OFDM symbol #3, #6, #9 and #12, and in the latter case, DMRS is mapped to OFDM symbol #
1, #4, #7 and #10.In above-mentioned two situations, remaining continuous OFDM symbol is mapped the data into, and is applied to it
STBC.It can be mapped as homogeneously as possible by repeating identical format for each set with reference to letter according to the frame structure
Number, so as to improve channel estimating performance.Figure 13 shows the example that DMRS is mapped to OFDM symbol #1, #4, #7 and #10.
As another example, it is assumed that there are four antennas, if the first OFDM accorded with as in Rel-14LTE V2X
Number and the last one OFDM symbol be respectively used to AGC and Rx/Tx switching time, then can be by removing in remaining 12 OFDM symbols
10 OFDM symbols other than two OFDM symbols are grouped into two set.
Assuming that reference signal needs to be mapped to four OFDM symbols to estimate phase as in Rel-14 LTE V2X
Position offset, then reference signal can be mapped to two set in each set in an OFDM symbol and do not wrapped
Include each of two OFDM symbols in set.
For grouping, it may be considered that following two example.
In the first example, can gather as given a definition two: { #1, #2, #3, #4, #5 } and { #7, #8, #9, #10, #
11}.Reference signal can be mapped to OFDM symbol #1 and #7 and remaining OFDM symbol in above-mentioned set, that is, OFDM
Symbol #6 and #12.Continuous OFDM symbol, i.e. OFDM symbol #2, #3, #4 and #5 and OFDM symbol can be mapped the data into
Number #8, #9, #10 and #11, and STBC can be applied between continuous OFDM symbol.Figure 14 is shown based on above-mentioned grouping
Reference signal mapping format.
In identical grouping, OFDM symbol #5 and #11 and remain that reference signal can be mapped in above-mentioned set
Remaining OFDM symbol, that is, OFDM symbol #6 and #12.Continuous OFDM symbol can be mapped the data into, that is, OFDM symbol #
1, #2, #3 and #4 and OFDM symbol #7, #8, #9 and #10, and STBC can be applied between continuous OFDM symbol.Figure
15 show the reference signal mapping format based on above-mentioned grouping.
In the second example, can gather as given a definition two: { #2, #3, #4, #5, #6 } and { #8, #9, #10, #11, #
12}.Reference signal can be mapped to OFDM symbol #2 and #8 and remaining OFDM symbol in above-mentioned set, that is, OFDM
Symbol #1 and #7.Continuous OFDM symbol, i.e. OFDM symbol #3, #4, #5 and #6 and OFDM symbol # can be mapped the data into
9, #10, #11 and #12, and STBC can be applied between continuous OFDM symbol.Figure 16 is shown based on above-mentioned grouping
Reference signal mapping format.
It is proposed the two grouping examples to improve channel estimating performance.Specifically, identical by being repeated for each set
Format map reference signal as homogeneously as possible, so as to improve channel estimating performance.
<second embodiment>
According to the second embodiment of the disclosure, when executing transmission using four antennas, two resources can be used will
SFBC is applied to two antenna ports, just as SFBC is applied to LTE downlink, but in four antenna ports,
Two antenna ports can alternately be used.When STBC is applied to time-domain resource, the transmission method can be applied similarly.
In this case, it is executed in four resources since orthogonal transmission is in two resources, so STBC
It can be applied to two continuous data resources.
Thus, it may be considered that following two method.
Assuming that first OFDM symbol and the last one OFDM symbol are respectively used to as in Rel-14 LTE V2X
AGC and Rx/Tx switching time.According to first method, { #1, #2 }, { #4, #5 }, { #7, #8 } and { #10, # are mapped the data into
, and the continuous OFDM symbol application STBC of every two 11 }.In this case, in four antenna ports, two antenna ports
Be used for { #1, #2 } and { #7, #8 }, and remaining two antenna ports are used for { #4, #5 } and { #10, #11 }, so as to
It applies STBC.Hereafter, reference signal is mapped to remaining OFDM symbol, that is, OFDM symbol #3, #6, #9 and #12.
According to second method, map the data into { #2, #3 }, { #5, #6 }, { #8, #9 } and { #11, #12 }, and every two
A continuous OFDM symbol application STBC.In this case, in four antenna ports, two antenna ports are used for { #2, #
3 } and { #8, #9 }, and remaining two antenna ports are used for { #5, #6 } and { #11, #12 }, to apply STBC to it.
Hereafter, reference signal is mapped to remaining OFDM symbol, that is, OFDM symbol #1, #4, #7 and #10.
In above-mentioned first embodiment and second embodiment, it is assumed that reference signal is mapped to four OFDM symbols.
The reason of reference signal is mapped to four OFDM symbols in Rel-14 LTL V2X is, it is contemplated that when vehicle UE high speed is moved
Phase offset quickly changes due to Doppler frequency shift when dynamic, if the quantity for being mapped to the reference signal of time resource increases,
Phase offset can be then easily adjusted.
However, when using STBC, it can be assumed that diversity is obtained between time quantum, because even STBC is not applied
In high speed UE, channel also quickly changes between time quantum.Assuming that STBC is only significant in low speed, then STBC can be applied
Low speed UE in real system.When STBC is applied to low speed UE, do not need for reference signal to be mapped to four OFDM symbols.
In this case, as in traditional uplink communication, reference signal can be mapped to two OFDM symbols, and
And remaining OFDM symbol can be used for data to improve efficiency of transmission.
The speed (that is, low speed) that STBC can be used in UE can be pre-configured with or be indicated by higher level signaling.
Based on above-mentioned it is assumed that will be described in third embodiment and the 4th embodiment when using two OFDM symbols
The mapping of reference signal and data.
<third embodiment>
According to the third embodiment of the disclosure, when two antenna ports are used for STBC, reference signal is mapped to
OFDM symbol #3 and #10, and data are mapped to remaining OFDM symbol.In this case, as in Rel-14LTE V2X
Like that, first OFDM symbol and the last one OFDM symbol are respectively used to AGC and Rx/Tx switching time.STBC is applied to surplus
Between the continuous OFDM symbol of every two in remaining OFDM symbol, i.e. { #1, #2 }, { #4, #5 }, { #6, #7 }, { #8, #9 } and { #
11, #12 }.By the way that OFDM symbol #3 and #10, channel estimating performance is can be improved in reference signal uniform mapping.Figure 17 is shown
Such reference signal and data map format.
<the 4th embodiment>
When four antennas are used for STBC, if first and the last one OFDM symbol as in Rel-14 LTE V2X
Number it is respectively used to AGC and Rx/Tx switching time, and reference signal is mapped to two OFDM symbols, then 10 OFDM of residue
Symbol.Assuming that data are mapped to all remaining 10 OFDM symbols, if every 4 OFDM symbols execute orthogonal transmission,
Remaining 2 OFDM symbols.If the performance for being similar to diversity 4 cannot be realized from remaining two OFDM symbols, may occur
Performance degradation, because actual performance depends on the transmission in remaining two OFDM symbols.
In order to solve this problem, above-mentioned second embodiment can be applied.That is, when using four antennas, SFBC can be with
It is applied to two antenna ports using two resources, just as SFBC is applied to LTE downlink, but in four antenna ends
In mouthful, two antenna ports can be alternately used as described in second embodiment.When by STBC be applied to time domain
When resource, the transmission method can be applied similarly.
In this case, it is executed in four resources since orthogonal transmission is in two resources, so STBC
It can be applied to two continuous data resources.
For example, when the format based on Figure 17 using four antennas to apply STBC when, by reference signal be mapped to OFDM symbol
Number #3 and #10, and map the data into remaining OFDM symbol.In this case, as in Rel-14LTE V2X, the
One OFDM symbol and the last one OFDM symbol are respectively used to AGC and Rx/Tx switching time.STBC is accorded with applied to residue OFDM
Between the continuous OFDM symbol of every two in number, i.e., { #1, #2 }, { #4, #5 }, { #6, #7 }, { #8, #9 } and { #11, #12 }.In
In this case, in four antenna ports, two antenna ports are used for { #1, #2 }, { #6, #7 } and { #11, #12 }, and
Remaining two antenna ports are used for { #4, #5 } and { #8, #9 }, to apply STBC to it.By the way that reference signal is uniform
Ground is mapped to OFDM symbol #3 and #10, and channel estimating performance can be improved.
It, can also even if another transmission uses four OFDM symbols when application third embodiment or four embodiments
By assuming that STBC sets two OFDM symbols for the density of reference signal for low speed UE.When instruction is based on its execution
It, can be automatically using the above-mentioned third embodiment or the 4th embodiment for assuming low reference signal density, without referring to when STBC
Show different reference signal density.
Hereinafter, the description of reference signal mapping when using multiple ports will be provided.Since LTE V2X assumes one
Transmission antenna, therefore reference signal is mapped for a port.However, using two or more when using STBC or SFBC
A antenna port, it is therefore desirable to be each antenna terminal mapping reference signal.
When reference signal is time-multiplexed (TDM) between the ports, the Time Density of reference signal is relative to a port
Reduce.Therefore, it is inclined to be not suitable for phase caused by compensating the Doppler frequency shift due to caused by the mobility in V2X communication for it
It moves.Therefore, it is desirable to using frequency division multiplexing (FDM) or code division multiplexing (CDM).This can be applied not only to all the first of the disclosure
Embodiment can be applied to the OFDM symbol that reference signal is mapped to the 4th embodiment.
For example, it is assumed that using FDM.When N number of antenna is used for STBC or SFBC, if FDM is mapped for reference signal,
Reference signal for each antenna port can be mapped to OFDM symbol, and wherein reference signal will be mapped in such a way that N is combed.
Figure 18 shows example of two antennas for STBC or SFBC, and Figure 19 shows four antennas for STBC's or SFBC
Example.Pectination mapping can equably arrange the reference signal for each port in a frequency domain, so as to improve channel estimation
Energy.
Figure 20 shows the base station (BS) that can be applied to embodiments of the present invention and user equipment (UE).
If in a wireless communication system including relay node, it is logical that backhaul link is executed between BS and relay node
Letter, and access link communication is executed between relay node and UE.Therefore, in some cases it may be replaced with relay node
Change BS or UE shown in figure.
Referring to Figure 20, wireless communication system includes base station (BS) 110 and user equipment (UE) 120.Base station 110 includes processing
Device 112, memory 114 and RF (radio frequency) unit 116.Processor 112 can be configured as the process realized and proposed in the present invention
And/or method.Memory 114 is connected to processor 112, and stores various information related with the operation of processor 112.RF
Unit 116 is connected to processor 112, and sends and/or receive radio or wireless signal.User equipment 120 includes processing
Device 122, memory 124 and RF unit 126.Processor 122, which can be configured as, realizes the process proposed in the present invention and/or side
Method.Memory 124 is connected to processor 122, and stores various information related with the operation of processor 122.RF unit 126
It is connected to processor 122 and sends and/or receive radio or wireless signal.Base station 110 and/or user equipment 120 can be with
With individual antenna or mutiple antennas.
Above embodiment can correspond to the combination of element and feature of the invention in the form of defined.And it is possible to
It is selective to consider that each element or feature can be, unless they are explicitly mentioned.Each elements or features can be with cannot
The form that combines with other elements or features is realized.Furthermore it is possible to by the way that element and/or feature are partly combined
To realize embodiments of the present invention.The sequence of the operation for each embodiment explanation of the invention can be modified.One
Some configurations of embodiment or feature can be included in another embodiment, or can substitute another embodiment
Corresponding configuration or feature.Also, it will be readily appreciated that can be by that will be closed in the following claims without clearly reference
The claim combinations of system configure new embodiment together, or can be wrapped after submitting application by modification
It includes as new claim.
In the disclosure, in some cases it may be executed and be interpreted by base station execution by the upper layer node of base station
Concrete operations.Specifically, in the network being made of multiple network nodes including base station, it is evident that be logical with user equipment
Letter and the various operations that execute can other network nodes by base station or in addition to base station execute.In this case, " base
Stand " can be replaced by the term of fixed station, node B, eNodeB (eNB), access point etc..
Various means can be used to realize embodiments of the present invention.For example, embodiments of the present invention can be used
Hardware, firmware, software and/or any combination thereof are realized.In the case where passing through hardware realization, one embodiment of the present invention
Formula can pass through ASIC (specific integrated circuit), DSP (digital signal processor), DSPD (digital signal processing appts), PLD
In (programmable logic device), FPGA (field programmable gate array), processor, controller, microcontroller, microprocessor etc.
At least one is realized.
In the case where being realized by firmware or software, an embodiment of the invention can be by above-mentioned for executing
Module, process and/or the function of functions or operations is realized.Software code be storable in memory cell and can then by
Manage device driving.
Memory cell can be set in processor or outside processor, to pass through various means known to the public and processing
Device exchanges data.
It will be apparent to one skilled in the art that the case where not departing from spirit or essential characteristics of the invention
Under, the present invention can be implemented in other specific forms.Therefore, above embodiment be considered as in all respects it is illustrative and
It is unrestricted.The scope of the present invention should be determined by the reasonable dismissal to appended claims, and of the invention
All changes in equivalent scope are all included within the scope of the disclosure.
Industrial applicibility
The method and device thereof of assigned references signal resource can be applied to various wireless communications in a wireless communication system
System.
Claims (10)
1. a kind of method for sending reference signal by sending device in a wireless communication system, the described method comprises the following steps:
Receive the configuration for the resource pool being made of uplink resource；And
Based on N number of antenna of resource pool configuration and the sending device, reference signal and data are mapped to specified upstream
Link circuit resource, wherein N is natural number,
Wherein, the reference signal is mapped to one or more specific positions in the specific uplink resource
The resource element at place, and
Wherein, the data are mapped to the specific uplink resource other than one or more specific position,
So that the data are orthogonal in a time domain or in a frequency domain and as many continuous with the quantity of the antenna.
2. according to the method described in claim 1, wherein, the reference signal and data are mapped at least one resource set
It closes, each resource collection is made of N+1 resource element, and wherein, is mapped to the ginseng of at least one resource collection
It is corresponding with the N+1 resource element to examine the distance between signal.
3. the reference signal is configured as being mapped to according to the method described in claim 2, wherein, N is 4, and wherein
In at least one described resource collection and at least one resource collection being not included in the specific uplink resource
Resource element.
4. according to the method described in claim 2, wherein, at least one described resource collection includes first resource set and second
Resource collection, and wherein, the first resource set and the Secondary resource set are configured with different antenna ends
Mouthful.
5. according to the method described in claim 1, wherein, only when the movement speed of the sending device is equal to or less than predetermined value
When, the data are just mapped, so that the data are orthogonal.
6. according to the method described in claim 1, wherein, by applying Space-Time Block Coding STBC, the number in the time domain
It is orthogonal on the uplink resource other than one or more specific position according to being configured as.
7. according to the method described in claim 1, wherein, by applying space-time/frequency block code SFBC, the number in the frequency domain
It is orthogonal on the uplink resource other than one or more specific position according to being configured as.
8. according to the method described in claim 1, wherein, the reference signal is in the time domain or the frequency domain with the comb side N
Formula is mapped.
9. according to the method described in claim 1, wherein, the uplink resource corresponds to uplink subframe.
10. a kind of sending device, the sending device for sending reference signal, the sending device in a wireless communication system
Include:
Radio frequency unit；And
Processor,
Wherein, the processor is configured to:
Receive the configuration for the resource pool being made of uplink resource；And
Based on N number of antenna of resource pool configuration and the sending device, reference signal and data are mapped to specified upstream
Link circuit resource, wherein N is natural number,
Wherein, the reference signal is mapped to one or more specific positions in the specific uplink resource
The resource element at place, and
Wherein, the data are mapped to the specific uplink resource other than one or more specific position,
So that the data are orthogonal in a time domain or in a frequency domain, and as many continuous with the quantity of the antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| US201762474582P | 2017-03-21 | 2017-03-21 | |
| US62/474,582 | 2017-03-21 | ||
| PCT/KR2018/003265 WO2018174543A1 (en) | 2017-03-21 | 2018-03-21 | Method for allocating reference signal resource in wireless communication system and apparatus therefor |
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| EP (1) | EP3605923B1 (en) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111986798A (en) * | 2020-09-04 | 2020-11-24 | 北京贝耀信科技有限公司 | Personal monitoring information transmission method and system based on medical big data system |
| CN114642043A (en) * | 2019-12-05 | 2022-06-17 | 高通股份有限公司 | Wireless communication with non-punctured symbols |
| CN115428384A (en) * | 2020-05-01 | 2022-12-02 | 高通股份有限公司 | Techniques for full duplex communication based on reference signal configuration |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114375555B (en) * | 2019-08-29 | 2024-04-12 | Lg电子株式会社 | Method for user equipment in wireless communication system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102379091A (en) * | 2009-03-30 | 2012-03-14 | Lg电子株式会社 | Method and apparatus for transmitting signal in wireless communication system |
| WO2013183975A1 (en) * | 2012-06-08 | 2013-12-12 | 엘지전자 주식회사 | Method and device for transmitting uplink control signal in wireless communication system |
| CN104704755A (en) * | 2012-10-04 | 2015-06-10 | Lg电子株式会社 | Method and apparatus for transreceiving downlink signal by considering antenna port relationship in wireless communication system |
| CN105162510A (en) * | 2009-03-23 | 2015-12-16 | Lg电子株式会社 | Method and device for sending reference signal in multiaerial system |
| WO2016133363A1 (en) * | 2015-02-17 | 2016-08-25 | 엘지전자 주식회사 | Uplink mimo stbc communication method in wireless communication system and apparatus for same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010533997A (en) * | 2007-05-04 | 2010-10-28 | アギア システムズ インコーポレーテッド | Method for selecting constellation rotation angles for quasi-orthogonal space-time and space-frequency block coding |
| KR101757452B1 (en) * | 2010-01-08 | 2017-07-13 | 삼성전자주식회사 | A method for mapping and demapping resource in a wireless communication system and an apparatus thereof |
| CN105309030B (en) * | 2014-04-10 | 2019-11-15 | 华为技术有限公司 | A kind of method, user equipment and the base station of reporting channel status information |
| WO2016004634A1 (en) * | 2014-07-11 | 2016-01-14 | Mediatek Singapore Pte. Ltd. | Method for enb, ue uplink transmission and reception |
| KR20170121263A (en) * | 2015-03-19 | 2017-11-01 | 후아웨이 테크놀러지 컴퍼니 리미티드 | D2D communication method and apparatus |
| CN107439047B (en) * | 2015-04-06 | 2021-06-08 | Lg电子株式会社 | Method for transmitting and receiving signal based on shared resource in wireless communication system and apparatus therefor |
| WO2017018703A1 (en) * | 2015-07-24 | 2017-02-02 | 엘지전자 주식회사 | Method for determining size of transmission block of uplink signal in wireless communication system and apparatus therefor |
| ES2835050T3 (en) * | 2016-02-05 | 2021-06-21 | Ericsson Telefon Ab L M | SRS design for unlicensed carriers |
| CN107666364A (en) * | 2016-07-27 | 2018-02-06 | 北京三星通信技术研究有限公司 | Selection and method, corresponding terminal device, the base station equipment for determining modulation coding mode |
-
2018
- 2018-03-21 EP EP18771681.6A patent/EP3605923B1/en active Active
- 2018-03-21 CN CN201880019281.1A patent/CN110447201B/en active Active
- 2018-03-21 WO PCT/KR2018/003265 patent/WO2018174543A1/en unknown
- 2018-03-21 US US16/492,250 patent/US11108516B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162510A (en) * | 2009-03-23 | 2015-12-16 | Lg电子株式会社 | Method and device for sending reference signal in multiaerial system |
| CN102379091A (en) * | 2009-03-30 | 2012-03-14 | Lg电子株式会社 | Method and apparatus for transmitting signal in wireless communication system |
| WO2013183975A1 (en) * | 2012-06-08 | 2013-12-12 | 엘지전자 주식회사 | Method and device for transmitting uplink control signal in wireless communication system |
| CN104704755A (en) * | 2012-10-04 | 2015-06-10 | Lg电子株式会社 | Method and apparatus for transreceiving downlink signal by considering antenna port relationship in wireless communication system |
| WO2016133363A1 (en) * | 2015-02-17 | 2016-08-25 | 엘지전자 주식회사 | Uplink mimo stbc communication method in wireless communication system and apparatus for same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114642043A (en) * | 2019-12-05 | 2022-06-17 | 高通股份有限公司 | Wireless communication with non-punctured symbols |
| CN114642043B (en) * | 2019-12-05 | 2024-03-08 | 高通股份有限公司 | Wireless communication with unpunctured symbols |
| CN115428384A (en) * | 2020-05-01 | 2022-12-02 | 高通股份有限公司 | Techniques for full duplex communication based on reference signal configuration |
| CN115428384B (en) * | 2020-05-01 | 2024-01-30 | 高通股份有限公司 | Techniques for full duplex communication based on reference signal configuration |
| CN111986798A (en) * | 2020-09-04 | 2020-11-24 | 北京贝耀信科技有限公司 | Personal monitoring information transmission method and system based on medical big data system |
| CN111986798B (en) * | 2020-09-04 | 2021-04-23 | 深圳市天方达健信科技股份有限公司 | Personal monitoring information transmission method and system based on medical big data system |
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| Publication number | Publication date |
|---|---|
| EP3605923A4 (en) | 2021-01-20 |
| CN110447201B (en) | 2022-04-15 |
| US20200162213A1 (en) | 2020-05-21 |
| EP3605923A1 (en) | 2020-02-05 |
| EP3605923B1 (en) | 2022-05-04 |
| WO2018174543A1 (en) | 2018-09-27 |
| US11108516B2 (en) | 2021-08-31 |
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